An update to SixGrid has been released. The update will be applied automatically when you restart SixGrid. The major changes include;

• Added Search Options, where you can only allow certain ratings, and/or block multiple tags.
  
• When querying e621ng-based websites with invalid credentials, the Search tool now displays an error message if there is one.
  
• The Steam New Feed can be viewed on the Home screen.
  

You can view the full list of changes, including code, on the SixGrid v0.3.5 Pull Request